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System and method of wavelength add/drop multiplexing having client configurability

Inactive Publication Date: 2005-08-09
AMERICAN TELEPHONE & TELEGRAPH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]Depending on the configuration of the optical switch matrix, any channels of the input optical signal can be dropped from the communication medium to any of the clients. The dropped channels can be received and processed by a receiver. Further, any channels from the add signal can be added to the communication medium. The added channels along with the remaining channels of the input signal can then be outputted and transmitted on the communication medium. Different from fixed optical wavelength add / drop multiplexers (OADMs) described in the related art, the invented optical switch matrix can be configured to allow each client to access any of the input channels, therefore offering client-configurability to the network.

Problems solved by technology

Such Optical-Electrical-Optical (OEO) conversion can be very complex, costly and time consuming.
Such a device lacks “client-configurability” and therefore severely limits the selection of which channels to add / drop for a client.

Method used

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  • System and method of wavelength add/drop multiplexing having client configurability
  • System and method of wavelength add/drop multiplexing having client configurability
  • System and method of wavelength add/drop multiplexing having client configurability

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Embodiment Construction

[0022]FIG. 1 shows an optical switch matrix system 100 for selectively adding and dropping channels from a transmission medium 120. The system 100 includes an optical switch matrix 102 having four ports: input port 104, output port 106, add port 108 and drop port 110. The input port 104 is optically coupled to a demultiplexer 112 for receiving input channels 104a-104f from the transmission medium 120. The output port 106 is optically coupled to a multiplexer 114 for transmitting optical channels 106a-106f onto the transmission medium 120. The add port 108 is optically coupled with the optical switch matrix 102 for inputting added channels 108a-108e that are connected to different clients. The drop port 110 is optically coupled with the optical switch matrix 102 for transmitting drop channels 110a-110e, possibly for further processing.

[0023]Both the multiplexer 114 and the demultiplexer 112 are optically coupled with the transmission medium 120. The transmission medium 120 can includ...

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PUM

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Abstract

An optical carrier drop / add transmission system and method for adding a signal to multiplexed input optical signals conveyed by an optical multiplex input line. The multiplexed input optical signals are demultiplexed to provide isolated input optical signals to an optical switch matrix comprising switches in an array of lines and columns, the isolated input optical signals being inputted in a direction parallel to a line of switches in the optical switch matrix. The added optical signal is input in a direction parallel to a column in the optical switch matrix. An output line is selected and the switch that is on the column on which the added optical signal is inputted and on the selected output line is switched.

Description

[0001]This non-provisional application claims the benefits of U.S. Provisional Application No. 60 / 172,732 entitled “Wavelength add / drop Multiplexer With Client Configurability” which was filed on Dec. 20, 1999 and is hereby incorporated by reference in its entirety. The applicants of the provisional application are Evan L. Goldstein, Lih-Yuan Lin and Robert W. Tkach.[0002]This non-provisional application also claims the benefits of U.S. Provisional Application No. 60 / 204452 entitled “Micro-machined Optical Add / Drop Multiplexer With Client Configurability” which was filed on May 16, 2000 and is hereby incorporated by reference in its entirety. The applicants of the provisional application are Chuan Pu, Evan L. Goldstein, Lih-Yuan Lin and Robert W. Tkach.BACKGROUND OF THE INVENTION[0003]1. Field of Invention[0004]This invention relates to optical communication. More particularly, this invention relates to systems and methods using optical switches for adding and dropping channels from...

Claims

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Application Information

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IPC IPC(8): G02B6/35H04J14/02
CPCG02B6/356H04J14/0212G02B6/3518G02B6/3538G02B6/3546G02B6/3586G02B6/3596
Inventor GOLDSTEIN, EVAN L.LIN, LIH-YUANPU, CHUANTKACH, ROBERT WILLIAM
Owner AMERICAN TELEPHONE & TELEGRAPH CO